64764564 has 12 divisors (see below), whose sum is σ = 151117344. Its totient is φ = 21588184.

The previous prime is 64764563. The next prime is 64764587. The reversal of 64764564 is 46546746.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×64764564² = 8388897500220192, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64764563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2698512 + ... + 2698535.

It is an arithmetic number, because the mean of its divisors is an integer number (12593112).

Almost surely, 2^64764564 is an apocalyptic number.

It is an amenable number.

64764564 is an abundant number, since it is smaller than the sum of its proper divisors (86352780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64764564 is a wasteful number, since it uses less digits than its factorization.

64764564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5397054 (or 5397052 counting only the distinct ones).

The product of its digits is 483840, while the sum is 42.

The square root of 64764564 is about 8047.6433817609. The cubic root of 64764564 is about 401.5865405694.

The spelling of 64764564 in words is "sixty-four million, seven hundred sixty-four thousand, five hundred sixty-four".